function check( field )
{
    for( i = 0; i < field.length; i++ )
    {
        field[ i ].checked = true;
    }
}

function uncheck( field )
{
    for( i = 0; i < field.length; i++ )
    {
        field[ i ].checked = false;
    }
}

function enter2tab( e )
{
    if( !e )
    {
        var e = window.event;
    }

    if( e.keyCode )
    {
        code = e.keyCode;

        if( e.which == 13 )
        {
            e.returnValue = false;
        }
    }
    else if( e.which )
    {
        code = e.which;

        if( code == 13 )
        {
            return false;
        }
    }
}